0.0%2.0%4.0%6.0%8.0%10.0%12.0%14.0%16.0%18.0%20.0%22.0%24.0%26.0%19871988198919901991199219931994199519961997199819992000200120022003200420052006200720082009201020112012201320142015
For-profit private institutions
Not-for-profit private institutions
Public institutions